SK is visually interesting and very unique in the way that problems are resolved. Takei clearly did a ton of thorough research into spirituality from a wide variety of cultures and wasn't a afraid to implement all of them into his art and the ideals of his characters. Which to me is what sets him head-and-shoulders above most supernatural action mangaka.
But YYH was simply funnier and had more engrossing action. The side characters aren't as memorable. But Yusuke has the best one-liners, and the tension was much higher. Yusuke and Kuawabara were so aggressively down-to-earth and unspiritual that there was a real human element to everything that was going on. See the scene where Yusuke tries to outrun the fuel truck for example.
Out of the five in the list Rurouni Kenshin is probably my favorite but Shaman King and Yu Yu Hakusho are right there. I have only seen bits and pieces of Hokuto no Ken and Saint Seiya so I can't give full opinions on them yet.